books.google.com - To have her characters better express ideas which might be abstract or hard to digest, Potter chose to write their dialogue in verse, though such is the narrative drive and the strength of the performances that for much of the time this seems like just more lyrical version of everyday speech. She says...http://books.google.com/books/about/Yes.html?id=ip8cAQAAIAAJ&utm_source=gb-gplus-shareYes

Yes: screenplay and notes

To have her characters better express ideas which might be abstract or hard to digest, Potter chose to write their dialogue in verse, though such is the narrative drive and the strength of the performances that for much of the time this seems like just more lyrical version of everyday speech. She says of her choice: "I read somewhere that in times of war the sales of poetry books go up. It's as though we need to use our most clear and rich tool, which is the tool of language, to express the subtleties and the nuances of our experience. And I think that verse is a kind of structure that allows us to explore language in a more interesting, more heightened way, then we tend to in everyday conversation."